It is usual with the Western Asiatics to carry various sorts of things in the bosom of their dress, which forms a somewhat spacious depository, being wide above the girdle, which confines it so tightly around the waist as to prevent anything from slipping through.
To have one in our bosom implies kindness, secrecy, intimacy (Genesis 16:5; 2 Samuel 12:8). Christ is in the bosom of the Father; that is, possesses the closest intimacy with, and most perfect knowledge of, the Father (John 1:18). Our Savior is said to carry his lambs in his bosom, which touchingly represents his tender care and watchfulness over them.